Posted by Geo-TH,In on July 16, 2021 at 06:13:25 from (50.102.8.173):
In Reply to: Electrical help posted by grandpa Love on July 15, 2021 at 19:06:57:
GP, There's only one problem with that old school analog meter. They are not fool proof. You get the polarity wrong, the meter will go backwards and bend the pointer. You connect the meter to voltage when on the resistance scale, the smoke will leave the meter. Ask me how I know?
Your meter is better than some digital meters when measuring charging voltage. Some digital meters will dance all over because the charging voltage isn't steady.
When your points are open, you should get full battery voltage on the + of coil. When your points are closed, you will get less than full battery voltage because some is used by ballast. My rule of thumb, 6v on coil and 6v on ballast will usually mean 4 amps in coil. Your meter can't measure 4 amps. 250 ma, quarter of an amp. If you have negative ground, the voltage at coil will be positive. BE CAREFUL, you get the polarity right, Use the largest voltage scale to prevent banging the pointer is you get the polarity wrong.
Another negative about they meter, It doesn't respond well to gravity, dropping it. Keep it in a clean place too. Metal particles will find their way to the magnet in meter movement.
Good chance you make one mistake and the meter won't forgive you.
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